Top: Spitzer/IRAC 8 μm image of the Galactic center region showing 6.7 GHz CH₃OH masers. Crosses (+) indicate the positions of 6.7 GHz CH₃OH masers placed in the Galactic center region based on position. The × symbols indicate the positions of 6.7 GHz CH₃OH masers placed in the Galactic center region based on velocity. The asterisks (*) indicate the positions of 6.7 GHz CH₃OH masers placed in the Galactic center region based on both distance criteria. The squares show the locations of the masers thought to reside in the disk. Sources that are circled are associated with an enhanced 4.5 μm emission source. Each maser is labelled with the velocity (in km s^-1) of the peak maser emission. Bottom: same as the top figure, but with a blank background instead of the 8 μm image.